B - Operations – Transporting – 01 – F
Patent
B - Operations, Transporting
01
F
18/641
B01F 15/04 (2006.01) B29B 7/28 (2006.01) B29C 44/04 (2006.01) G05D 11/13 (2006.01)
Patent
CA 1235869
METHOD AND APPARATUS FOR PRODUCING POLYMER ARTICLES Abstract of the Disclosure The specification describes urethane foam automobile seats having variable firmness or density or varying in some other property from one portion of a seat to another by combining several hardenable precursor constituents in a predetermined ratio and discharging the resulting mixture through a single nozzle into a predetermined place in the mold and then changing the constituents and/or ratios of the con- stituents as the mixture discharges into other parts of the mold to produce the desired property in each part of the seat. The mixing of the various constituents is under the control of a computer programmed to deliver to each mold a series of shots of the polymer mixture, each constituent being supplied at the proper rate, and gradually and simultaneously changing the flow of each constituent at the beginning and end of each shot to maintain a consistent ratio within each shot yet allowing a change of ratios from one shot to the next.
472152
Baluch Donald T.
Zimmerman Paton M. Jr.
General Motors Corporation
Gowling Lafleur Henderson Llp
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